Discharge Of The Safety Valves; Emergency Stop - Daikin UATYA-BBAY1 Manuel D'installation, D'utilisation Et D'entretien

2.1.1

Discharge of the safety valves

If present on the refrigerant circuit, installation requirements and/or national regulations lay down that the discharge
of the safety valves must be routed to the outside.
The safety valves are always fitted and their exhaust is routed outside the closing panels. Installation needs and/or
national regulations require the gas exhausted from the safety valves to be routed to the outside.
The conveying must be done with a pipe whose diameter must be at least that of the valve outlet, and the weight of
the pipe must not be borne by the valve.
Always direct the discharge to areas where the jet cannot cause harm to anyone.
Risk of burns following contact with hot and cold parts.
any material exhausted from the safety valves must be conveyed using pipes in compliance with
the national and/or European directives: the exhaust point must not be close to trap-doors, manhole
covers and any other opening where refrigerant may be contained; exhausted material must not
be conveyed close to fresh air inlets, doors or similar openings; exhausted material must not be
conveyed close to ignition sources, as defined in standard EN378-2.
According to the definition given in standard EN378-1, the site of installation of these units is defined
as category III, i.e. no restriction applies as to the amount of refrigerant contained in the unit.
It is responsibility of the installer to carry out a flammability risk assessment and a classification
of the danger zone at the site of installation, as required by standard EN378-3 and/or the national
regulations in place.
Standard EN13136:2013 should be referenced for the calculation and sizing of the safety valve
exhaust.
Zone 2 forming from the emissions of a safety valve may extend horizontally up to 10 metres and
vertically up to 11 metres.
The installer is responsible for assessing the risk areas.
Exhausted material must not be conveyed close to ignition sources, as defined in standard EN378-2.
Where the existing local regulations are more stringent, these should be taken as reference.
2.1.2

Emergency stop

In case of emergency, an immediate stop is carried out using the red disconnecting switch/master switch on the
electrical control panel by turning it to 0. When it is turned to 0, the disconnecting switch turns off the power to the
whole unit.
The main disconnect switch/master switch, used to electrically isolate the unit, is also intended for use
as an emergency device and it is only in an emergency that it should be used to stop the unit.
Except the case of an emergency stop, the unit must be stopped using its control software.
We reserve the right to make changes without any prior notice.
UATYA
4P645202-2
Translation from original instructions
Packaged Rooftop
11